Setting concrete piles.



PATBNT'ED APR P. SHUMAN SETTING CONCRETE PILES. VAPPLICATIONFILED .I ULY26,1905.

Speccaton of Letters Patent. lfatentetl LApril eine@ ipplioation filed July 26, 1905. Serial llo. 271,325.

Jne following is speeiication. invention relates to 'that method ol' forming concrete piles in wliioh a preparatory pile, usually in the forni of a hollow metal tube, is lijst driven into the ground to torni an opening for the reception of the concrete or winch the per .ianentpile is to be composed 'the hollow preparatory pile being ordinarily withdrawn either before, during, or after the filling in of the concrete. Suoh preparatory piles 'nave heretofore been provided with ooints which have been either detachable, so t they could be lett at the bottoni of the le as the tubular pilfJ was withdr wn, have n removable through the pile before filling in jne eonorete, or have been in the form of pivoted aws or valve ineinbers which would swing apart as the pile was withdrawn, so as to permit of the passage of the concrete between thorn.

l ind that in the formation oi concrete es in many oifierent kinds of soil for in 1 nee, in those which are rnarsliy or el a olayey natuie-tlie use oil a point el any kind een be dispensed with if the hollow preparatory pile is lled '-.vith the concrete before being driven, and said concrete is prevented frein escaping at the top, the pile in this oase havin@ the saine eil'eot as a solid pile, but the metallic tube being susceptible oi being withdrawn from the Concrete after 'it has been driven, so as to leave said oon-i ete in the opening which has been formed. if it is ilesired to use a point, the latter een be a simple 'plug at the the points heretofore use ln the accompanying drawings, Figure l is a vi u" llustrating the iirst step 1n the formation a eonorete pile in accordance with my' Tori-.1aed at lower end with a plug 2, irorn hieh the pipe l een be readily withdrawn 'the driving of the pile. The pipe'isset p `n 'the desired position between the leads ot' the pile-driver and either before or after 'oreinents in Setting Concrete Piles, ol"

bottoni of the pile, and therefore oi a rnuoh simpler and shea er share-eter than Tl e preparatory pile which l use in carrying ont my present invention may consist of inea/al tube or nipel, open at both ends-.or

being thus set up is lled with eonerete, which is ol a relatively wet or plastic eliaraoter, so that it can slide easily in the The top of the pipe is'then, by prete' ee, elosetl by ineens oi a sap-plate 3, on r i h rests the driving-head, if a detaellable n e driving-head is used, or the detaohahle drivingliear. may be.

used as 'the closure for the top the eroe. This eoneiete-iilled hollow pipe then driven in the saine manner as an ordinary solid pile and aots in the saine way aswould suoli asollrl pile, being driven just as true and as safely.

l have shown at the lower end of the pipe a 'plug 2, which is tapered at the lower end; but a simple disl; tnay be employed, or a plug of relatively dry and stiff concrete a foot or two in depth may be used, or a plug of any kind rnay be dispensed with, since the blunt lower end of thepile does not interfere to any material extent with the driving of the saine in that class of soils tor whioli piles of this character are intended. ln inarshy soil a point does not materially facilitate the driving oi' the pile, and in clayey soil a mass of vclay has a tendency to loi-ni in advance of and travel ahead of the pile so as to Constitute, in eflect, a substitute ror a point.

Alter the pile has been. driven to the desired extent, as shown Fig. 2, the pipe 1 is withdrawn from the concrete filling, thelatter being sufficiently plastic to enter and till the space `orinerly occupied the pipe, as shown in Fig. 3, suitable pressure being, if desired, imparted to the top oi the plastic mass of concrete in order to insure the ejection of the same from the pipe. li desired, air or other fluid under pressure may be introduced through the tube 4 between the closed top el the and the to oi the mass of concrete therein, so as to simu taneously fo'roe the pipe upward and the oonorete downward.

lt will be evident that a plu 2, suoli as l have shown, is niuoh cheaper an sini l'ertlian a detachable point suoli as lieretolbre oroposed for use in connection with a lio low preparatory pile, sinoaaclipoint rnust be molded with a shoulder to oonstitute a bearing ,for the lower of the pipe anti inust be strengthened in order to enable it to .resist the lblows of the pipe, which are exerted upon the limited area represented by said. shoulder.

My improvement in lorining eonorete piles `is available ior use generally, eiteept in'easee where the boulders.

Hariri thus described my invention, I claim enf? desire to secure by Letters letentl. rThe inode herein described of setting e concrete pile, seid inode consisting in first surrounding the mass of concrete with a pipe, driving the two es e unit, end then Withdrawing the pipe.

2. The mode herein described of setting e concrete pile, seid Inode consisting in iirst iilling e pipe with vplastic concrete, Vpreventing escape ofthe letter et: the top ofthe pipe,` driving the pipe thus lfilled, .end then with-1 drawing the pipe and leaving the mess of' concrete in the opening. 3. The modeherein described of settingre.

concrete pile, said mode consisting -in irst filling e pipe with plastic concrete, preventing escape of the letter et the top ofthe pipe, driving the filled pipe end then removingfthe pipe and forcing the plastic mess therefrom,

es said pipe is being withdrawn.

Ll. The mode herein described of setting e concreto pile, seid mode consisting in provlding e. removable plug et the bottoni ci the pipe, vfilling seid pipe with concrete, pre-ven ff 2 5 ing escape of the letter et the top of the pipe, driving, seid lilled pipe, end then withdrawing the pipe endfleeving the plug and the mess of concrete in the opening.

5. The inode herein described of setting e concrete ipilefseid Inode consisting in filling; with plastic concrete e pipewhich is open or has e removable closure et its lower end, preventing escape of seid concrete et the-top of the pipe, driving seid. lled pipe, and then vvwithdrwing the pipe endforcing the concrete therefrom by introducing fluid under pressure :between .the topfofthe massof con- -creteiefnd the closed top of the pipe.

'In -testimony whereof I "have signed .my 4ol lneme tcthis specification in `tliepresenceof two subscribinglwitnesses.

' FRAN-K SHUMAN.

Witnesses:

WM. E. SHUISE, Jos. H. KLEIN. 

